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event_bus

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Traceable, extendable and minimalist event bus implementation for Elixir with built-in event store and event watcher based on ETS

Retired package: Deprecated
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event_bus lib event_bus models event.ex
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lib/event_bus/models/event.ex 

defmodule EventBus.Model.Event do

  @moduledoc """

  Structure and type for Event model

  """



  @enforce_keys [:id, :topic, :data]



  defstruct [

    :id,

    :transaction_id,

    :topic,

    :data,

    :initialized_at,

    :occurred_at,

    :ttl

  ]



  @typedoc """

  Defines the Event struct.



  * :id - Identifier

  * :transaction_id - Transaction identifier, if event belongs to a transaction

  * :topic - Topic name

  * :data - Context

  * :initialized_at - When the process initialized to generate this event

  * :occurred_at - When it is occurred

  * :ttl - Time to live value

  """

  @type t :: %__MODULE__{

    id: String.t | integer,

    transaction_id: String.t | integer,

    topic: atom,

    data: any,

    initialized_at: integer,

    occurred_at: integer,

    ttl: integer

  }



  @doc """

  Duration of the event, and simple answer of how long does it take to generate

  this event

  """

  def duration(%__MODULE__{initialized_at: initialized_at,

    occurred_at: occurred_at})

    when is_integer(initialized_at) and is_integer(occurred_at) do

    occurred_at - initialized_at

  end

  def duration(_),

    do: 0

end